Step 1 of 5
The maker is often too close to judge the work
Right after you finish writing, you read what you meant to say and slide past an obvious typo, because the words are too familiar to inspect. An assistant that just produced a draft falls into the same trap: it knows every choice it made, so it judges what it intended rather than what it wrote. A stronger check comes from a helper with no stake in the work, one that looks only at what sits on the page. Distance from the work is what lets the check catch what the maker missed.

Practice
A good first piece to check is a finished draft, plan, proposal, or contract that already has a clear purpose.